Looper-thread guide



Sept. 10, 19 29. BECKER 1,728,158

LOOPER THREAD GUIDE I Filed June 22, 1927 W'Wmaau I mm 5 v V D Patented Sept. 10, 1929.

UNITED STATES PATENT o ri='1cE.

RUDOLPH BECKER, or NORTH PLAINFIELD, Nnw' matey, AssieNon TO THE SINGER V MANUFACTURING COMPANY, or ELIZABETH, NEW JERSEY, A CORPORATION or NEW JERSEY.

Application filed June 22,

This invention relates to sewing machines, more particularly of the multiple needle twothread chain-stitch type embodying upper needles and under thread-carrying loopers,

and has for an object to provide means for freely guiding the looper threads to the loop ers to avoid friction of one looper thread against another and the danger of entanglement of the looper threads caused by the whipping tendency ofthe threads under high speed sewing conditions. A further object of the invention is to provide for easy introduction of the looper threads to the machine. Still further the invention has for an object to provide a looper-thread guide which is of simple construction and which may be readily assembled with the machine or detached therefrom.

To the attainment of the ends in view, the

machine bed is formed externally with a groove leading from the looper-thread tensions to the loopers, and a looper-thread guide of multiple-trough shape is removably seated in said groove. A plurality of retainer fingers are each secured at one end to the machine bed, said fingers extending transversely across the open sides of the thread guiding troughs and serving to retain the looperthread guide in the groove in the machine bed, as well as to retain the threads in said troughs while permitting easy lateral insertion of the threads therein.

In the accompanying drawings Fig. 1 is a rear side elevation of the cylinder-bed of a sewing machine embodying the invention. Fig. 2 is a section on the line 2-2, Fig. 1, and Fig. 3 is a perspective view of the thread guide detached from the machine bed.

According to the preferred embodiment of the invention illustrated, 1 represents the base and 2 the cylinder-bed of a sewing machine within which is housed the usual feeding mechanism 3 and suitable under thread mechanism including a plurality of thread carrying loopers 4. While the specific character of the under thread mechanism is immaterial to thepresent invention, I prefer to use that shown and described in my copending application, Serial No. 200,592, filed here- LOOPER-THBEAD GUIDE.

1927. Serial No. 200,593.

with, in which application the present inven- I the apertured thread-guiding plate 9 and the discharge end adjacent the loopers 4 with the apertured thread guiding plate 10. Extending across the thread-guide 6 are a plurality of retainer fingers 11 each of which is secured at one end by screws 12 to the bed 2 and is free at its other erd 13 to-permit ready lat- I eral insertion ofnthe loopenthreads in their respective troughs. The retainer fingers are received in transverse grooves 14 in the machine bed which register with transverse grooves 15 in the guide 6.

The invention is not be understood as limited to the details of construction of the looper-thread guide shown and described, as

such details may obviously be materially mod- I ified within the spirit and scope of the invent-ion.

Having thus set forth the nature of the invention, what I claim herein is 1. In a sewing machine, the combination with a cylinder-bed having an external groove extending longitudinally thereof, of a multiple-trough-shaped thread-guide seated in said groove, and a plurality of retainer fingers'disposed transversely of said threadguide, each of said fingers being secured at one end to saidbed and being free at its other end to permit easy lateral insertion of the thread in said trough.

2. In a sewing machine, the combination with a cylinder-bed having an external groove extending longitudinally there0f,of a multiple-trough-shaped thread-guide seated in said groove flush with said cylinder-bed and formed with transverse recesses, and a plurality of retainer fingers disposed transversely of said thread-guide and sunk below the surface of said cylinder-bed so as to lie in said notches, each of said fingers being secured at one end to said bed and being free at its other end to permit easy lateral insertion of the threads in said thread-guide.

In est meny whe e I a e s ned my name tn thisfsp'ecification.

, BUPQQ I, 

